Abstract No.C181120-291

Author name(s): Hongjian CAO

Company: Advanced Technology Research Center, Bureau Veritas Marine & Offshore Division, China

The hull form optimization achieves good designs of bow part of ship even only considering the hull resistance. However, due to complicated interaction between hull and propeller, the optimization of stern part is more difficult than that of bow part. In order to perform good optimization of a ship in shallow water, the impact of parametrical deformation of stern part on the hydrodynamic performance is studied numerically considering the shallow water effect. Hull deformations are performed with an efficient parametrical hull optimization platform OptNav. The self-propulsion performance is evaluated by CFD simulations with the actuator disc method modeling hull-propeller interaction. Several deformations sets are performed and evaluated and the impact on the self-propulsion performance are studied by the analysis of the relationship between deformation amplitudes and the predicted delivered power of all deformed hulls. The study shows that the presented stern deformations have significant impact on the self-propulsion performance of the ship, which should be paid special attention to during the early ship design stage.

KEY WORDS: optimization; hull deformation; self-propulsion; actuator-disk

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